1
T471A
Q540
J505
SW5
JP409
JW42
R518
C515
R487
KQ
IC501-H3
471-H5
JP408
JP407
JP403A
JP405
C540
D512
J503
R512
C518
C527
R519
C520
R515
R522
C510
C517
R525
R516
C514
R511
R510
D476
J406
R477A
C486
R492
C491
R475
R485
R474
C449
D468
D467
D448
C469
D486
R486
R484
R477
JP404
J405
C471
JW6
R48
3
R481
R481A
T471-H7
T471-H11
T471-H6
T471-H8
T471-H10
IC501
IC501A
JP483
J502
JP477
FC3G2 CHASSIS
J501
JP1403
J022
J023
J018
IC1401
J019
K1004
C1502
J020
IC1501
JP403
J510
JW39
JW38
(SOLDER
SIDE)
FBT
E
E
9
7
E
E
E
10
E
C651
T611
L613
C617
D611
3
C
62
9
L612
D616
D617
L615
R623
R624
Q613-H4
Q612
!
J609
T611A
T611-H7
T611B
R628
R629
T611B-H13
14
T611B-H12
4
T611-H13
T611-H12
D671
R671
J627
R681
Q681
52
C656
R652
C655
D651
L651
2
C652
C663
R663
R664
C639
D662
R665
R661
J625
D693
C693
R695
Q693
R103
J626
D661
D439
T431
C425A
C424A
C465
J403
R434
C432
T431-
H
C434
R431
Q431
R433
C425
C424
L432
T431-H
Q432A
L4
62
-H
3
L462
L4
62
-H
2
TP-B
J238
Q613-H6
VR651
JP631
J6
J401
R660
JW11
JW12
JW10
JP431
JP633
W13
Q662
J603
JW33
JW8
+B
ADJT
JW41
-14-
Service Adjustments
Note:
+B (+130V) Voltage Check and Grayscale Adjustment
must be completed before attempting High Voltage Check.
(1) Connect high voltage voltmeter negative lead to
ground, and c lead to anode of picture tube.
(2) Tune receiver to an active channel and confirm TV is
operating properly.
(3) Maximize the beam current by adjusting the contrast
and brightness controls to maximum. Confirm high
voltage is within 23.0 KV and 25.0 KV at maximum
beam current.
(4) Eliminate the beam current by adjusting the contrast
and brightness controls to minimum. Confirm high
voltage does not exceed 26.5 KV at zero beam current.
No high-voltage adjustment is provided on this chassis.
HIGH VOLTAGE CHECK
(1) Connect DC meter to TP-B and the ground.
(2) Tune the receiver to an active channel and synchro-
nized picture. Select NATURAL picture mode by press-
ing the
PICTURE MODE
button on the remote control.
(3) Adjust B-voltage to be 130 ± 1V DC by using VR631.
B-VOLTAGE SUPPLY CHECKING
(1) Receive the monochrome circular pattern.
(2) Set the brightness to normal and contrast to maximum.
(3) Adjust the focus control on the F.B.T. for the best focus
on the screen centre.
FOCUS ADJUSTMENT
MAIN BOARD
B-Voltage Supply Adjustment
Focus VR
(Upper side)
MAIN BOARD